The population hasn't grown that much, Wuppertal has a bit over 350k inhabitants now, Barmen and Elberfeld (which became Wuppertal in 1929) had a combined popul

The population hasn't grown that much, Wuppertal has a bit over 350k inhabitants now, Barmen and Elberfeld (which became Wuppertal in 1929) had a combined population of slightly under 300k in 1900. The traffic jams are mostly the result of lifestyle choices.